Friday 22
Problem of the Day
If you had a banana, apple, orange, and a pear. You have to have two fruits. What combinations could you use?
You can use a tree diagram or an organized list to solve the problem.
You can have 6 combinations with the fruit.
Lesson 2-1 Mental Math (adding)
math calculations that you do in your head
You can add numbers in any order- Commutative Propety of Addition
ex. 5+7 or 7+5
You can change the grouping of numbers when you add- Associative Propety of Addition
ex. (3+2)+8 = 3+(2+8)
5+8+13 or 3+10=13
The sum is the answer in addition.
7+5=12
Addends (ex. 7 & 5)
Sum (ex. 12)
1) 89+46=135 135-89=46
2) 301+61=362 362-61=301
3) 400+157=557 557-157=400
4) 722+158=880 880-722=158
5) 523+223=746 746-223=523
6) 804+396=1,200 1,200-804=396
7) 299+206=505 505-299=206
8) 878+534=411 411-878=534
9) 1,000+7,000=8,000 8,000-7,000=1,000
10) (52+8)+25=85
11) $1.65 change 98 into 100, 100+67=167-2=165
12) $1.27 change 82 into 80+45=125+2=127 or
13) B $4.00 $2.53+$3.47=$6.00 $10-$6=$4.
14) You would break apart the 303 into 302. Then you would add 678 to it. 678+302=980+1=981.
PS 2-1
1) 72 into 71 71+39=110+1=$111
2) $18+72=$90
3) 9 into 8+1 39+1=40+8=48
4) No, Mr. Iverson can't bye the basketball and net because it equals $27.
5) She would have to pay $528.
6) She would have to pay $268.
7)The most expensive Andrea can buy with her horse is the saddle and the boots.
8) I solved number five by using compensation metal math. This is what I did:
I broke apart 149 into 130 130+379=509+19=528.
Tueday 26/10
Test taking practice
1)To make it easier to add, you would do this like this; (74+6)+5=85.
2) It would be C . I broke apart 73 into 70 70+85=155+3=158.
Lesson 2 Mental Math- Subtracting
69-23=46 easy to do when there is no regrouping
/\
20+3
69-20=49-3=46 30-9
30-10=20+1=21
98-15
98-10=88-5=83 Counting On
400-185 190 200 400 5+10+200=215
164-94 94 100 164 6+64=70
164-94=70 check w/ addition 70+94=164
R 2-2
ex. 162-48
162-50=112+2=114
1)86-14=72
2)66-58=8
3)141-46=95
4)206-78=28
5)164-94=70 I solve the problem by doing this; I made 94 into 90 164-90=74-4=70
Wed. 27/10 Spiral Review 2-3
Thurs. 28/10 PS 2-2
Estimating Sums and Diffrenence
answer in + answer in -
Estimate when you do not need an exact answer.
When you see the word about you don't need to know the exact answer when you add or subtract.
2 ways to estimate
(1) Using rounding (better way)
ex. 1,248 1,200 to round to the addens
+2,579 2,600 the add
3,800
( 2) Front-end estimation (Mrs.Shami does not like it, so don't use it unless says so)
1,248 1,000 1,248+2,579=3,827 (real answer)
2,579 2,000
3,000
Fri. 29/10
PS 2-2 & PS 2-3
Mon. 11/1/10
Spiral Review 2-4
Overestimate and Underestimate
When an estimate is greater than the actual number, it is called an overestimate.
When an estimate that is less than the exact number answer, it's called an underestimate.
ex. 825+346=1,171 800+300=1,000 est. underestimate
ex. 4,825+2,517= 7,342 5,000+3,000=8,000 est. overestimate
ex. 372+238=610 400+200=600 est underestimate
ex. 575-138=437 600-100=500
Wed. 11/3
Spiral Review 2-5
Mon. 11/8
Spiral Review 2-6
Adding Whole Numbers and Money
Add 275+ 137 est. 280+140=420 +137
412
1) estimate the sum
2) Write the addeds under each other, lining up the place values
3) Add the ones, regroup if necessary
4) Add the tens, regroup if necessary
5) Add the hundreds, regroup if necessary
6) Compare to actual to see if it makes sense
ex. 7,376+2,719= est. 17,000+3,000=10,000 2,719
10,095add $36.25+$12.94 est. $40+$13=53
11/9
Spiral Review 2-7
Wed. 11/10
Subtracting Whole Numbers and Money ex.415-377 377+38=415
- 377 38 420-380=40 est. 1) estimate 2) write the numbers under each other, lining up the place values 3) start at the ones, regroup if necessary 4) check with addition
ex. 504-278= 500-300=200 504
-278 +226
278 504
11/11/10 1)use mental math - (no regrouping)
ex. 4,800-100=
2)pencil and paper (very litte regrouping)
16,375-11,125
3) calculator (lots of regrouping)
10,367+22,143+29,972
11/12/2010
11\15\10
11\16\10
Palindromes-words, sentences, or numbers that are the same written backword and frontward. ex.racecar, the year 2002, level pup, pop, dad, and mom
11\17\10
10+25 25 less 11
25-10 25-11
6 more than 25 25+6
25 decreased by 6 25-6
11 increased by25 11+25
14 combined with 2 14+2
11\18\10
Pia had $20 spent $7 earned
( $20-$7)+9
Paretheses-tell which operation in an equation to do first
12-(2+6)= 4 (12-2)+6=16
11\19\10
Evaluating Expressions
variable-sybol that stands for a number
z=17
variable dont use o t or l for the addition or subtraction like z=17
Expressions that have variables are called algebraic expressions
ex X +8
if X=3
3+8=11
y-12
if y=42
42-12=30
m 32+m l 4 l 36 7 l 39
12 l 44
11/22/10
Solving Addition and Subtraction Equation equation- a number sentence that uses an equal sign to show that 2 expressions have the same value.
ex.8+9=17 ex. 100- 40= 60 ex. x+3=7 ex, 7+3=4+6 ex. 7+3+2=5+5+2 solution- to equation is the value of the variable that makes the equation true.
ex.x +3= 7 equation ex. x =4 solution Isolate- your variable -keep it all by itself on one side of the equation.
11/23/10
Have a happy Thanksgiving!
11/29/10
11/30/10
12/2/10
Meanigs of Multiplication
The numbers you multiply to get a product are called factors.
The answer in multiplication is called the product.
Multiplication is a short cut for addition.
6+6+6+6=24
When objects are arranged in equal rows, they are called arrays.
12/3/10
Arrays are the easier way to learn Multiplication. Patterns in Multiplication
Every time you skip count by two you end up with an even numbers.
Every time you skip count by five you go odd, even, odd, even, and so on with the numbers. Multiple - the product of any 2 whole numbers
Is 8 a multiple of 2?
Yes because there even number
4 x 2 = 8 Multiplication Properties Zero Property- the product of any number and zero equals zero
Chapter 5
Multiplying by multiples of 10, 100, 1,000
3x4=12
3x40=120
3x400=1,200
3x4,000=12,000
ps 5-1
40 cups of whole wheat flour
160 cups of whole weat flour
400 cups of whole wheat flour
Problem of the Day
If you had a banana, apple, orange, and a pear. You have to have two fruits. What combinations could you use?
You can use a tree diagram or an organized list to solve the problem.
You can have 6 combinations with the fruit.
Lesson 2-1
Mental Math (adding)
math calculations that you do in your head
You can add numbers in any order-
Commutative Propety of Addition
ex. 5+7 or 7+5
You can change the grouping of numbers when you add-
Associative Propety of Addition
ex. (3+2)+8 = 3+(2+8)
5+8+13 or 3+10=13
The sum is the answer in addition.
7+5=12
Addends (ex. 7 & 5)
Sum (ex. 12)
1) Breaking Apart
ex. $145+$39
/\
5+ 34
145+5=150
+34=184
2)Compensation (making up for)
$145+$39
145+40=185-1=184
ex.78+44 Breaking Apart or Compensation?
Compensation
78+40=118+4=122
Breaking Apart
78+44
/\
70+8
70+44=114+8=122
Spiral Review
2-2
P 2-1
1) 89+46=135 135-89=46
2) 301+61=362 362-61=301
3) 400+157=557 557-157=400
4) 722+158=880 880-722=158
5) 523+223=746 746-223=523
6) 804+396=1,200 1,200-804=396
7) 299+206=505 505-299=206
8) 878+534=411 411-878=534
9) 1,000+7,000=8,000 8,000-7,000=1,000
10) (52+8)+25=85
11) $1.65 change 98 into 100, 100+67=167-2=165
12) $1.27 change 82 into 80+45=125+2=127 or
13) B $4.00 $2.53+$3.47=$6.00 $10-$6=$4.
14) You would break apart the 303 into 302. Then you would add 678 to it. 678+302=980+1=981.
PS 2-1
1) 72 into 71 71+39=110+1=$111
2) $18+72=$90
3) 9 into 8+1 39+1=40+8=48
4) No, Mr. Iverson can't bye the basketball and net because it equals $27.
5) She would have to pay $528.
6) She would have to pay $268.
7)The most expensive Andrea can buy with her horse is the saddle and the boots.
8) I solved number five by using compensation metal math. This is what I did:
I broke apart 149 into 130 130+379=509+19=528.
Tueday 26/10
Test taking practice
1)To make it easier to add, you would do this like this; (74+6)+5=85.
2) It would be C . I broke apart 73 into 70 70+85=155+3=158.
Lesson 2 Mental Math- Subtracting
69-23=46 easy to do when there is no regrouping
/\
20+3
69-20=49-3=46 30-9
30-10=20+1=21
98-15
98-10=88-5=83
Counting On
400-185 190 200 400 5+10+200=215
164-94 94 100 164 6+64=70
164-94=70 check w/ addition 70+94=164
R 2-2
ex. 162-48
162-50=112+2=114
1)86-14=72
2)66-58=8
3)141-46=95
4)206-78=28
5)164-94=70 I solve the problem by doing this; I made 94 into 90 164-90=74-4=70
Wed. 27/10 Spiral Review 2-3
Thurs. 28/10 PS 2-2
Estimating Sums and Diffrenence
answer in + answer in -
Estimate when you do not need an exact answer.
When you see the word about you don't need to know the exact answer when you add or subtract.
2 ways to estimate
(1) Using rounding (better way)
ex. 1,248 1,200 to round to the addens
+2,579 2,600 the add
3,800
( 2) Front-end estimation (Mrs.Shami does not like it, so don't use it unless says so)
1,248 1,000 1,248+2,579=3,827 (real answer)
2,579 2,000
3,000
Fri. 29/10
PS 2-2 & PS 2-3
Mon. 11/1/10
Spiral Review 2-4
Overestimate and Underestimate
When an estimate is greater than the actual number, it is called an overestimate.
When an estimate that is less than the exact number answer, it's called an underestimate.
ex. 825+346=1,171 800+300=1,000 est. underestimate
ex. 4,825+2,517= 7,342 5,000+3,000=8,000 est. overestimate
ex. 372+238=610 400+200=600 est underestimate
ex. 575-138=437 600-100=500
Wed. 11/3
Spiral Review 2-5
Mon. 11/8
Spiral Review 2-6
Adding Whole Numbers and Money
Add 275+ 137 est. 280+140=420
+137
412
1) estimate the sum
2) Write the addeds under each other, lining up the place values
3) Add the ones, regroup if necessary
4) Add the tens, regroup if necessary
5) Add the hundreds, regroup if necessary
6) Compare to actual to see if it makes sense
ex. 7,376+2,719= est. 17,000+3,000=10,000
2,719
10,095add $36.25+$12.94 est. $40+$13=53
11/9
Spiral Review 2-7
Wed. 11/10
Subtracting Whole Numbers and Money
ex.415-377 377+38=415
- 377
38
420-380=40 est.
1) estimate
2) write the numbers under each other, lining up the place values
3) start at the ones, regroup if necessary
4) check with addition
ex. 504-278=
500-300=200
504
-278
+226
278
504
11/11/10
1)use mental math - (no regrouping)
ex. 4,800-100=
2)pencil and paper (very litte regrouping)
16,375-11,125
3) calculator (lots of regrouping)
10,367+22,143+29,972
11/12/2010
11\15\10
11\16\10
Palindromes-words, sentences, or numbers that are the same written backword and frontward. ex.racecar, the year 2002, level pup, pop, dad, and mom
11\17\10
10+25 25 less 11
25-10 25-11
6 more than 25 25+6
25 decreased by 6 25-6
11 increased by25 11+25
14 combined with 2 14+2
11\18\10
Pia had $20 spent $7 earned
( $20-$7)+9
Paretheses-tell which operation in an equation to do first
12-(2+6)= 4 (12-2)+6=16
11\19\10
Evaluating Expressions
variable-sybol that stands for a number
z=17
variable dont use o t or l for the addition or subtraction like z=17
Expressions that have variables are called algebraic expressions
ex X +8
if X=3
3+8=11
y-12
if y=42
42-12=30
m 32+m
l
4 l 36
7 l 39
12 l 44
11/22/10
Solving Addition and Subtraction Equation
equation- a number sentence that uses an equal sign to show that 2 expressions have the same value.
ex.8+9=17 ex. 100- 40= 60 ex. x+3=7 ex, 7+3=4+6 ex. 7+3+2=5+5+2
solution- to equation is the value of the variable that makes the equation true.
ex.x +3= 7 equation ex. x =4 solution
Isolate- your variable -keep it all by itself on one side of the equation.
11/23/10
Have a happy Thanksgiving!
11/29/10
11/30/10
12/2/10
Meanigs of Multiplication
The numbers you multiply to get a product are called factors.
The answer in multiplication is called the product.
Multiplication is a short cut for addition.
6+6+6+6=24
When objects are arranged in equal rows, they are called arrays.
12/3/10
Arrays are the easier way to learn Multiplication.
Patterns in Multiplication
Every time you skip count by two you end up with an even numbers.
Every time you skip count by five you go odd, even, odd, even, and so on with the numbers.
Multiple - the product of any 2 whole numbers
Is 8 a multiple of 2?
Yes because there even number
4 x 2 = 8
Multiplication Properties
Zero Property- the product of any number and zero equals zero
Chapter 5
Multiplying by multiples of 10, 100, 1,000
3x4=12
3x40=120
3x400=1,200
3x4,000=12,000
ps 5-1
40 cups of whole wheat flour
160 cups of whole weat flour
400 cups of whole wheat flour
80 canines